Carbureter.



J. M. DYTGN CARBURETBR. .APPLICATION FILED Amm, 1910.

Patented Feb.

Elim/vanto@ ?FTW..

JAMES IM. DAYTGN, Gl TOlRING-TDN, CONNECTICUT, ASSGNOR TG EXCELSIB.NEEDLE CQEPANY, TORRNGTQN, CGNNECTICUT, e.

CORPRATEON 0F CONNECTICUT.

- CARR Specification of Letters Patent.

innemeniee'b. 1i, iais.

it' known iiiiai James M, Dumon', a eiiizen of ine Uniefl Skates.i'es'ling ai; Tori'ing'ion. in the :izouniy of Lieliiield, Siate' of'Fini eeieut, have invented certain new ,i anv ossei-.il I'npioveniens infai'burefzers,` of which die following is a description, refeienee benhad .io the aooon'xpanying drawing and 'lo the leiteis and igui'es ofrefei- Reli liereon. i inven'ion l'elaies co .new and usefulinipoifements in earburete fs, and more espeoallf.1 'o earbu'fetei'swhich pi'ovided wiili a nain aii' inlet through which folie aix` isfiiee e-fl oval' ille spray nozzle, and an .iaiy inlet for snppiyingfurther air to he mixture.

A n objeo;J of lie invenion is io pi'ovide means foi? auiomaieailyafljnsing the choke in a eaibiueter of the above elia'faeei.

EL further objectA of the invention is to pfovifle means foroontroliingihe quan'it-gf' of an' liat passes by the spray nozzle, dueto the suction o1 hilf ngine at low speed.

These and otliei objees Wili in part be obvious, and Will in :sar be"neenafer more uily clesorioeri.

En the diawings which show by Way of illusiaion, one enibofiinent of theinvention; diguie is seoional View thiougli af earbureter havingimprovements aigplied tbeieto. Fig. 2 is a. section on the line il.; 2,of Fig. l. Fie. 2 is a sec-tion on the line 3, 8, of Fig. l., showingthe ball in adjusted position, and the increased area of the choke.

My improved eaibui'eeei' includes the usual ioat chamber l, in which islocated a float 2, which coni'ols the supply of gasolene to the` floatchamber. A spray nozzle 3, projects from the float chamber into theJflnoat l of the earburetez'. Said spay nozzie may be controlled by theusual adjustable needle valve which provides a normally fixed butadjustable c'ieliveiing oiee. As herein shown, the oai-bumper is formedwith a U-shaped an' passage and yElie spray nozzle 3 is located at thelowein portion of said Ushapenl passage. One end of the U- shapedpassage leads from a main air inlet 5,. rlhe other end oit' the U-shapedpassageA leads to a nal mixing Chamber 6. The casing of elle car'bureteris provided with a. gauze screen T which is located between illie finalmixing ehan'ibei.' and 'eine .spiny nozzle ille the the and serves ameans of' bifeaking up gasolenel pray and tlioioug'hly mixing same withthe all' drawn in tlnough main an' inlet 5. v ,An iuxlliaiyr an :niet 8supplies further aii" to the final i'nixingg chamber so that the mixturecoming iluough 'lie seieen ,may

be pi'opeily,modified. according @o ille 'equii-ernents of die engine.The auniliay air inlet is ooniiolled by a 'valve 9 mounted on a siem 1Gthat rests against a plunger l1, extending' into casing l2 annioontollel by a spi-ing which nozrnially b olfls the auxiliary valve 3closed.

'.l -e 'iension spring is ailjusefi by a sui able tlnnnb nut i3, Thisa'uziiiiaiy aix inlet valve and its eonrollii mechanism forni no part ofthe present inventiona but is shown, nes ibed and` claimed in myeopending application, Sinaai No. 525,941,

ilecl ANovenibei? 2nd, 190W y A 'iln'oiile 'valve lll is pivoecl at 151o the 'upper enel of the Caibueei, serves as a means forooni-follind'al e supply of mixture to 'the engine. Sani ,lnotile valvemay beA operaed in the well ifnown manner. lb has been found in prac cethat when the cliameez of the choke 'lle eabni'etei" is Iliadesufficiently le a to supply lie engine ai: high speeds, thai- Wnen the'engine is op-ei'atecl at low speeds, ilie :"vtion is noli sufficient tooperate the au ry valve and as' all tl1e an is supplim lirougii the mainail' intake which passes one? the spiay nozzle, too inuel'i fuel Wiil beLira-Wn iom I the nozzle. This is due finiariiy to one fac-.t thai thearea o ihe ein. :e 4l is feo great for low engine speeds when the chokeis made of sufficient ai'ea to aeeonirnolaie lA igli engine speeds.

In order that the ciokeof lie eai'bui'eter may be varied for vai'yingengine speedsj l1 have provided a valve l@ which :is lieiein shown is inthe form of a bell. Said ball normally rests upon a cross pin o? olreisupport 17. The'passage through the bui'eter between the spray nozlae7and 'the gauze screen 7 is cone sliape wih he base of the Conesubstantially ,fie

ne sor-een.

low engine speeds, the snoeien not sui'li Aeo tively smallrarea .is leftaround the upper side of the ball fqr the passage ofthe mixture from themain air intake over the nozzle to the final mixing chamber'.

-space between the ball and the casing of the carbureter, as shown inFig. 3, is greatly increased. lt will be obvious, that the varyingspeeds of the engine will cause varying degrees of suction and lift theball varying distances from the cross pin'l, and consequently producevarying arcas in the passage way for the minture of air and fuel or avarying choke for different engine speeds.

When the engine is running 'at slow speed, the ball 16 rests on its scatas the suction will not be suflicient to lift the ball. The suction,however, will be suiiicient to open the auxiliary valve t) and take in asmall amount of air through the auxiliary air inlet, which will be mixedwith the air received from the main air inlet, and fuel in the finalmixing chamber, thus modifying the mixture which would be otherwise toorich at slow engine speeds. As the speed of the engine increases asabove noted, the ball will be raised, increasing the area of thechoke'and supplying a greater amount of air from the main air intake and`also a greater quantity of fuel for the increased demand of the engine.It will be seen therefore, that the ball acts as a valve whichautomatically varies the size of the choke. lVhen the engine speed isincreasing, the ball is lifted toward thelarger end of the funnel-shapedor cone-shaped passage thus gradually enlarging the opening throughwhich the gas may4 pass.

When the engine .slows down, the ball gradually returns. As the quantityof gasolene deliveredto the final mixing clamber varies with thequantity of air passing the spray nozzle, the automatic control of theiow of the gasolene at the spray nozzle, is secured by the action of theball. The Wire gauze screen fitted across the air passage below thefinal mixing chamber not only breaks up the gasolene spray, but willalso limit the lmovement'of the ball. The valve for the auxiliaryairinlet is so controlled as to furnish the correct amount of air to mixwith the air and gasolene supply through the main passage of thecarbureter.

It will be obvious that minor changes in the details of construction andthe arrangerment of parts may be made without departing from the spiritof my invention.

Having thus particularly described my invention, what I claim as new anddesire to secure by Letters Patent is 1. A carbureter including incombination,

a spray nozzle, an auxiliary air inlet located in advance of said spraynozzle, a valve for controlling said air inlet, a constant air inletthrough which the air is drawn by the suction of the engine over thespray nozzle, the passage. through the carbureter adjacent the nozzleand in' advance thereof, being cone-shaped and gradually increasing indiameter, and a valve controlled by gravity and the suction of theengine located in said cone-shaped passage, and in advance of said spraynozzle.`

2. A carbureter including in combination, a spray nozzle, an auxiliaryair inlet 'located in advance of said spray nozzle, a-

valve for controlling said air inlet, a con- -stant air inlet throughwhich air is drawn by the suction of the engine over the spray nozzle,the passage through the carbureter adjacentthe nozzleand in advancethereof,

the passage through the carbureter adjacent the nozzle, and in advancethereof being cone-shaped and gradually increasing in diameter, a balllocated in Said cone-shaped passage, slightly smaller' in diameter than`said passage, a cross pin supported by the casing, and serving as arest for said ball.

` 4. A carbureter including in combination, a spray nozzle, an auxiliaryair inlet located in advance of said spray nozzle, a valve forcontrolling said air inlet, a constant main air inlet through which airis drawn by the suction of the engine over the spray nozzle, the passagethrough the 'carbureter adjacent .the nozzle and in advance thereof,being cone-shaped and gradually increasmg in diy ameter, a ball locatedin said cone-shaped passage slightly smaller in diameter than saidpassage, and agauze screen carried by the casing and extending 'acrossthe air passage between the ball and ithe auxiliary air inlet.A

5. A carbureter including in combination, a casing having a U-shaped airpassage, a spray nozzle located at the lower side of said U-shapedpassage, a constant air intake at one end of' said U-shaped passage, theother end of said U-shaped passage bemg tapered "outwardly, a balllocated 4in said tapered portion of said passage',l and being of aslightly smaller diameter than the smallest diameter of said passage,means against which said ball rests when the engine is running at slowspeed.

6. A carbureter including in combination,

assess? a casing having a lai-shaped air passage, a spray nozzle ioeatedat the lower side of said ll-shaped passage, a constant air intake atone end of said U-shaped passage, the other end or said U-shaped passagebeing tapered outwardly, a ball loeateolin said tapered portion of saidpassage, and being of a slightly smaller diameter than the smallestdiameter of said passage, means against which said ball 'rests when theengineis running at sioW speed, a gauze screen cari'ed loyv the easingand extending across the air passage at the outer end of said taperedportien. A

l. A carbureter including in combination, a easing having a U-shaped airpassage, a spray nezzle located at the lower side of said Sil-.shapedpassage, a constant air intake at one end of said U-sliaped passage, theother end `of said [Ll-shaped passage being tapered outwardly, a baliiov/ated insaid tapered portion of said passage and being 'of a slightlysmaller diameter than the smallest diameter of said passage, meansagainst which said bali rests when the engine is running atsloW speed, afinal mixing chamber at the `end oi said tapered pertion si? theU-sliaped passage, an auxiliary air iniet leading to said final mixingchamber, and a valve controlled by trie suction oi site engine forclosing said auxiliary air in testimony whereof i my signa ture, inpresenoe of two Witnesses.

JAMES M. 'BAYTU Witnesses D. Himbeere, M. A. @i1/imm.

